Update version from 0.5.0 to 0.5.1

Author: jvsguerra

AtomPacker/__init__.py

@@ -9,7 +9,7 @@
 the resulting structures.
 """
 
-__version__ = "0.5.0"
+__version__ = "0.5.1"
 __name__ = "AtomPacker"
 license = "GNU GPL-3.0 License"